1242371705 has 4 divisors (see below), whose sum is σ = 1490846052. Its totient is φ = 993897360.

The previous prime is 1242371699. The next prime is 1242371719. The reversal of 1242371705 is 5071732421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 495552121 + 746819584 = 22261^2 + 27328^2 .

It is not a de Polignac number, because 1242371705 - 2²² = 1238177401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124237166 + ... + 124237175.

It is an arithmetic number, because the mean of its divisors is an integer number (372711513).

Almost surely, 2^1242371705 is an apocalyptic number.

It is an amenable number.

1242371705 is a deficient number, since it is larger than the sum of its proper divisors (248474347).

1242371705 is an equidigital number, since it uses as much as digits as its factorization.

1242371705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248474346.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 1242371705 is about 35247.2935840470. The cubic root of 1242371705 is about 1075.0215838464.

The spelling of 1242371705 in words is "one billion, two hundred forty-two million, three hundred seventy-one thousand, seven hundred five".